3.1 cam bearing orientation question

[ProX]

What is the orientation of the front cam bearing oiling holes? More specifically what is the clock position of the hole with the notch (with the engine upright)?

[geoffinbc]

4 o clock. With the dual hole bearing put one hole at 4 o clock and the second hole comes before that at 2 o clock or so

[ProX]

4 o clock. With the dual hole bearing put one hole at 4 o clock and the second hole comes before that at 2 o clock or so

I'm not sure I follow.

My front bearing has two holes as you say, but they are 90* apart. That would place the notched hole at 4 o clock and the other at 7 o clock.

Also my block has 3 holes in the front position. One at 6 o clock, one around 10 o clock and the other at approximately 2 o clock. The hole at the 6 o clock appears to be the main feed and the other two appear to feed the lifter galleys. They are connected by a full circumference groove...

[geoffinbc]

No turn it counter clockwise more so they are at 4 and 1. The oil galleys don't matter the bottom one (6 o clock) feeds the main and cam. the left and right ones feed the lifters.

[ProX]

No turn it counter clockwise more so they are at 4 and 1. The oil galleys don't matter the bottom one (6 o clock) feeds the main and cam. the left and right ones feed the lifters.

I think I've got it... Notched hole at 4 and the other hole at 1 (engine upright), correct? I must have been overthinking it some... OK, maybe a bunch.

[ProX]

Okay... So due to extenuating circumstances (cam bearing being installed wrong by the machinist and damaged- prior to my first post) I've gotten a replacement. The problem is it is a Durabond piece (set) and the other 3 are FM or SP. Not really an issue except the Durabond cam bearings don't have the notched hole.

This brings me to ask- is the clock position still the same and should I notch it???

[geoffinbc]

Does it have 1 or 2 holes? The shape of the hole is not critical. 2 holes are not even necessary I am not sure of the true logic behind it but I am running a set of small block bearings and have only 1 oil feed hole for the front bearing. But in any case the orientation is the same.

[ProX]

Does it have 1 or 2 holes? The shape of the hole is not critical. 2 holes are not even necessary I am not sure of the true logic behind it but I am running a set of small block bearings and have only 1 oil feed hole for the front bearing. But in any case the orientation is the same.

Yeah, that's one detail I forgot to mention.. It does have only one hole. So, 4 o clock it is.

Thank you for your help!!!

-X-